149873987 has 2 divisors, whose sum is σ = 149873988. Its totient is φ = 149873986.

The previous prime is 149873947. The next prime is 149874007. The reversal of 149873987 is 789378941.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 149873987 - 2⁶ = 149873923 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (149873917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74936993 + 74936994.

It is an arithmetic number, because the mean of its divisors is an integer number (74936994).

Almost surely, 2^149873987 is an apocalyptic number.

149873987 is a deficient number, since it is larger than the sum of its proper divisors (1).

149873987 is an equidigital number, since it uses as much as digits as its factorization.

149873987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3048192, while the sum is 56.

The square root of 149873987 is about 12242.3031738313. The cubic root of 149873987 is about 531.1804553578.

The spelling of 149873987 in words is "one hundred forty-nine million, eight hundred seventy-three thousand, nine hundred eighty-seven".